Disk harrow



(No Model.) 4 Sheets-Sheet 1.

J. MAOPHAIL.

DISK HARROW No. 528,172.- Patented not. so, 1894.

,Ewaz 02" ml: ymRRXS PCKERS c0. monnr'na, WASHINGTON. D. c.

.(No Model.) 4 Sheetf-Sheerh 2.. i

J. MAOPHAIL, DISK HARRQW.

1 I Patented 0011,30, 1894 4 sheetssheet 3.

(No Model.) J. MAO'PHAIL.

DISK HARROW No: 528,172. Patented 001;. so, 18 94,.

r c Nonms mans 10., Fuorumnu. WASHINGTON o c momma. 4 Sheets-Sheet 4.

J. MAGPHAIL.

v V DISK HARROW. v ,1 2 Patented Oct. 30, 1894.

t y t I t 6 ,9 f8 /7 a? 4 mums PETERS CO., PHuTo-urnm WASHINGTON u. a

UNITED STAT S,

PATENT OFFICE.

JAMES MACPHAIL, OF ROCKFORD, AssIeNoR TO ABRAM ELLwooD, OF

DE KALB, ILLINoIs.

DISK HARROW.

SPECIFICATION forming part of Letters Patent No. 528.172, dated October30, 1894. Application filed June 1, 1893. $erial No. 476.274.. (Nomodel.)

To all whom it may concern following is a specification, reference beinghadto the accompanyingdrawingain which- Figure l is a top or plan View.Fig. 2 is a section on line 2-2 of Fig. 1. Fig. 3 is an enlarged detail,being aview of the adjacent ends of the disk gangs, one of the gangsbeing insection. Fig. at is a plan View of one of the coupling plates.Fig. 5 is an enlarged detail, being avertical section on line 5-5 ofFig. 2. Figxti is a section on line 66 of Fig. 1. Fig. 7 is a section online 77 of Fig. 1. Fig. 8 is an enlarged detail, being a front view ofone of the gangs, showingthe mechanism for shifting the scrapers; andFig. 9 is a partial sectional view on line 9-9 of Fig. 1.

My invention relates to disk barrows, and.

'has for its object to provide a new and improved harrow which will bewell adapted for the different kinds of work to which such implementsare usually subjected.

Disk harrows as heretofore constructed have not, as a usual thing, beenprovided with any device for cultivating the narrow strip left betweenthe adjacent ends of the harrow gangs. devices-consisting of a shovel orof disks-- have been provided. In implements in which a disk has beenused for the purpose stated, it has been secured to the inner end of oneof the disk gangs in such manner that the cen tral disk would move withthe gang and would be adapted to cultivate the groundbetween the innerdisks of the gangs. When such gangs were adjusted, however, the centraldisk would be moved in the are of acircle, and would therefore be movedmore or less out of line, which is objectionable, as it necessitates there-adjustment of. the central disk. This objection is avoided in mypresent invention by providing a disk which is movable in the line ofdraft, so that when the disk gangs are adjusted the center disk willalso be adjusted, but will always remain on the central line.

In some cases,however, such Another feature of my invention consists inthe provision of improved devices for changing the angle of the centraldisk so that it will take more or less of the soil.

In using central disks, in addition to the adjustments above suggestedit is desirable thatmeans should beprovided for lifting the disksinorder to avoid stones and other obstacles, and a further featu re of myinvention consists in providing such lifting devices for thecentraldisks, and in providing means for holding the disks upon theground with a yielding pressure.

My invention further consists in providing an improved bearing for theinner ends of the disk gangs, whereby their adjustment is more easilyeffected and the machine is made steadier in its action. I My inventionalso consists in the provision of improved mechanism for adjusting thedisk scrapers, and in certain other features of construction shown; allof which will be more fully set forth in the following specification.

That which I regard as new will be set forth in the claims.

In the drawings,-1O indicates the tongue of the harrow, which isconnected to a cross bar 11 and is braced by braces 12, as shown inFig. 1. The tongue carries a seat-bar 13, as shown in Fig. 2.

14E15 indicate disk gangs, which are arranged at opposite sides of themachine and are pivotally connected to the cross bar 11 by straps 16 andbraces 17, as shown in Figs. 1 and 7. The straps 16 are pivotallyconnected to bolts 18 carried by standards 19,which are mounted uponsleeves 20 mounted upon the gang shafts 21. A standard 19 is providednear the end of each gang, and upon such standards are mountedweightboxes 22, as shown in Figs. 6 and 7. As shown in Figs. 3 and 7,the gang shafts 21 are square in cross section, and upon them aremounted a series of disks 23,. which are provided with square holes toadapt them mm the shafts 21.

24 indicates sleeves or spools which are placed upon the shafts 21between the successive disks, and serve to hold the disks apart, in theusual manner.

Upon the inner end of each shaft 21 is mounted a collar 25, which isheld in place by swaging the end of the shaft, as shown in Fig. 3. Thecollars are provided with circumferential flanges 26, as shown in Fig.3.

27-28 indicate upper and lower coupling plates, which serve to couplethe inner ends of the gangs together. The coupling plates 2728 areprovided with cars 29, by means of which they are secured together, asshown in Figs. 2 and 5. The plate 27 is provided at its edges withflanges 30, which extend downward and are opposite to similar flanges 31carried by the lower plate 28, as best shown in Fig. 5. The arrangementis such that the flanges -31 will overlap the flanges 26 of the collars25, so that when the plates 2728 are bolted together the harrow gangswill be securely coupled together. Such coupling will not interfere withtheir adjustment at Varying angles with each other.

As best shown in Fig. 5, the plate 27 is provided on its under side witha central web or flange 32, and the plate 28 is provided with a similarflange 33 which lies opposite the flange 32 and a short distance fromit.

34 indicates a hardened steel ball, the di; ameter of which is slightlygreater than the distance between the flanges 32-33, and said ball isprovided with acircumferential groove 35, which is adapted to receivethe flanges 3233, as shown in Fig. 5. The bal134 serves as a bearing forthe ends of the gang shafts 21, which are slightly dished to adapt themto form a broader bearing surface. By this construction the gangs arecoupled together, and by reason of their having a com mon hearing themachine is made more of a unit, its action is much steadier, and it maybe much more readily adjusted.

The angular adjustment of the gangs is effected by means of a hand lever36, which is mounted upon the tongue 10 and is provided with a dog 37which engages the notches of a segmental rack 38 mounted upon thetongue, as best shown in Fig. 2. The lower end of the lever 36 extendsbelow the tongue, and is connected by connecting bars 3940 with theinner ends of the disk gangs, as shown in Figs. 1 and 2. By thisconstruction the angular adjustment of the gangs may be effected byoperating the lever 36. The bars 3940 are preferably provided with aseries of adjusting holes 41, as shown in Fig. 2.

42 indicates a connecting bar, the forward end of which is connected tothe lever 36 below the connecting bars 3940. Its rear end is connectedto the upper coupling plate 27 by a bolt 43, which passes through an ear44 formed on the upper side of said coupling plate, as best shown inFig. 5.

45 indicates a curved bar, the forward end of which is pivotallyconnected to the rear end of the bar 42 back of the car 44, its rear endforming a bearing for a disk standard 46, which carries the central disk47. By this construction, when the lever 36 is operated to move theinner ends of the disk gangs forward or backward, the central disk 47will be moved in the same direction and will remain in the line ofdraft.To effect the angular adjustment of the central disk 47, the standard 46is provided at its upper end with an arm 48, which is keyed thereto andprojects in a substantially horizontal plane therefrom. The arm 48 isconnected by a rod 49 to the inner end of one of the disk gangs, asshown in Fig. 1. I prefer to provide the arm 48 with a series ofadjusting holes 50, so that the degree of adjustment. may be varied. Bythis construction, when the central disk is moved forward or backwardthe angle of the disk 47 will be changed, it being turned to a greaterangle with the line of draft when the disks are moved forward. Thisangular adjustment is desirable owing to the fact that when the diskgangs are adjusted angularly the forward edges of the inner disks arethrown toward and from each other, thereby making the central stripnarrower or wider as the case may be, and the angular adjustment of thecentral disk compensates for such adjustment of the gangs.

To lift the central disk 47 in a right line to avoid obstacles, such asstones, roots, &c., I provide a lever 51, which is pivotally mountedupon the bar 42 near its rear end, as shown in Fig. 2, which lever 51may be locked in position by a dog 52 which engages the notches of asegment 53 secured upon the bar 42, as shown in Fig. 2. The lever 51 isprovided with a boss 54 at one side, through which boss passes a rod 55,the rear end of which is pivotally connected to the upper end of the bar45, as shown in Fig. 2.

56 indicates a pin which passes through the rod forward of the boss 54.

57 indicates aspring, whichis mounted upon the rod 55 between the boss54 and the pivotal point of said rod. By this construction, by operatingthe lever 51 the disk 47 may be moved upward in a right linesuflicientlyto avoid ordinary obstacles.

The connections of the rod 49, which is connected to the arm 48 and toone of the gangs, as above described, are loose, to permit of suchmovement of the central disk. By mounting the central disk as abovedescribed, the spring 57 will exert a downward pressure upon it, holdingit yieldingly in contact with the soil, so that the disk may yieldsufficiently to pass over small obstacles.

The vertical movement of the central disk 47 in a right line isadvantageous, in that it is possible to vary the depth of the furrowproduced by the disk, and it is more readily controlled than a diskwhich simply turns laterally, because when the disk is in a furrow it isdifficult to turn it laterally, as the dirt on I each side tends toresist such movement. It

is possible, however, to readily lift the disk' in this construction thedisk would shift the furrow to one side of the original line.

58 indicates scraper-supporting rods, which aresupported insuitablebearingsin the stand ards 19. I prefer to make the rods 58 ofhalf round iron, as shown in Figs. 6 and 7.

59 indicates a channel formed in the under side of the weight boxes 22over the scraper rods 58, as shown in Figs. 6 and 7. 1 This arrangementis to permit of the partial rotation of the rods 58.

60 indicates scrapers, which are mounted upon the rods 58 and areprovided with broad scraping surfaces adapted to scrape the concavesurfaces of the disks 23.

61 indicates a stirrup, having inclined inner edges, as shown in Fig. 8.Astirrup 61 is secured to the weight box 22 of each gang, as shown inFig. 1. l

62 indicates a foot lever, one of which is se cured to each scraper rod58, passing under the Weight box 22 and through the stirrup 61, as shownin Fig. 8. The weight of the scrapers 60 is sufficient to normally holdthem in the position shown in Fig. 6 when they are out of contact withthe surfaces of the disks. By depressing the foot lever 62 the scraperrod 58 to which it is attached will be partially rotated, and at thesame time will be moved longitudinally, owing to the fact that the lever62 will be guided laterally by the inclined sides of the stirrup 61. Thescrapers will thereby be forced into contact with the disks, and thepressure of the scrapers upon the disks will be regulated by thepressure upon the foot lever- When the foot lever is released thescrapers will swing back out of contact with the disks.

Although the coupling devices are herein shown as used in connectionwith disk-gangs, it is obvious that any other suitable cultivatingdevices can be employed in lieu of the disks, without aifecting theoperation of the coupling or connecting plates between the disk-gangs.

That which I claim as my invention, and desire to secure by LettersPatent, is

1. The combination with two disk-gangs, of a pair of connected plateswhich couplethe disk-gangs together at their inner ends and are providedwith projecting flanges, and a ball having a circumferential groove intowhich said flanges extend, substantially as described.

2. The combination with two disk-gangs, of a pair of plates 27 and 28which loosely engage and connect the disk-gangs together at their innerends and are provided with flanges projecting toward each other, and aball interposed between and engaged with the in- .ner edges of saidflanges, substantially as described.

3. The combination with two disk gangs having their shafts provided withflanged collars 25, of plates 27 and 28 having flanges 32 and 33projecting inward toward each other and flanges 30 and 31 which couplethe flanged collars of the shafts together, and a ball 34 having acircumferential groove into which the said inwardly projecting flangesextend, substantially as described.

4., The combination with a disk-gang, of a laterally movable scraper-bar58, carrying scrapers, a vertically swinging lever 62 connected with thescraper-bar and movable bodily inlateral directions, and an inclinedguide for directing the movements of the lever, substantially asdescribed.

5. The combination with two gangs of disks, of an angularly adjustablecentral disk arranged between the innermost disks of said gangs andmovable vertically in a right line, mechanism for angularly adjustingthe disk relatively to the line of draft, and means for moving thecentral disk vertically in a right line, substantially as described.

6. The combination with two gangs of disks, of a central disk arrangedbetween the innermost disks of said gangs and movable vertically in aright line and also adjustable angularly to the line of draft, mechanismfor moving the central disk vertically in a right line, means forangularly adjusting said central disk, and means for locking saidcentral disk in an elevated position, substantially as described.

'7. The combination with disk-gangs, of a pivoted-bar 45, acentraldisk-standard 46 carried by said bar, means for turning the standard onthe bar, a pivoted swinging lever 51, a rod 55 connected with the saidbar and loosely engaging a part of said lever, and a spring 57 mountedon the rod, substantially as described.

8. The combination with disk gangs, of a pivoted bar 45, a central diskstandard carried thereby, lever5l, rod 55 connected to said lever and tosaid bar 45, and a spring 57 upon said rod 55, substantially asdescribed.

9. In a disk harrow, the combination with two disk gangs, of a lever 36,connecting bar 42, bar 45 pivoted to said bar 42, a central diskstandard carried by said bar 45, and connecting bars 39 connecting saidlever 36 to said disk gangs, substantially as described.

10. The combination with disk gangs, a lever 36, connecting rodsconnecting said lever to the disk gangs, a central disk movable in theline of draft, devices connecting said disk with said lever 36, anarm 48carried by said disk, and a rod 49 connecting said arm with one of thedisk gangs, substantially as described.

JAMES MAOPI-IAIL.

Witnesses;

S. M. HUNT, D. P. CARY.

